interfaces solution using Typescript or JavaScript and All solution of HackerRank https://github.com/deepak14ri/Hackerrank-30-Day-Challenge

function main() {
        // Enter your code here
        var n = Number(inputLines[0]);
        var sum = 0;
        for(let i=1;i<=n;i++){
                if(n%i==0){
                        sum+=i;   
                } 
        }
        console.log('I implemented: AdvancedArithmetic'+'\n'+sum);

}

My solution

int divisors_sum = n;
for(int i = 1 ; i <= n/2 ; i++){
    if(n % i == 0)
        divisors_sum += i;
}
return divisors_sum;

I am a little bit confused. I "solved" the challenge, but it doesn't seem like they even needed/wanted to specifically implement an interface. Even the linked tutorial uses interface and implements the way I was taught, but the stub code forces different syntax becasue you can't redesign AdvancedArithmetic to be an interface. Which Cacluate would then implement. Can someone explain? BTW I am solving the challenges in python.

Python 3

def divisorSum(self, n):
        divisor = [x for x in range(1, n+1) if n % x == 0]
        return sum(divisor)